Dalila Hellali

Phase Diagram of the AgNO3–CsNO3 System

The phase diagram of the binary AgNO3–CsNO3 system was constructed using differential thermal analysis (DTA) technique in the range 300–700 K. The apparatus is described briefly. The results exhibit a congruently melting compound CsNO3·AgNO3 (m.p.=453 K) characterized by two allotropic varieties α and β, an incongruently melting compound AgNO3·CsNO3 (m.p.=450 K) with three forms α′, β′ and γ′, two eutectics (16 mol% CsNO3, 442 K and 32.5 mol% CsNO3, 445 K) and a peritectic (38mol% CsNO3, 450 K). The occurrence of the transitions of intermediates was confirmed by X-ray diffraction at variable temperatures. The phase diagram exhibits also two plateaus at 429 K and 435 K corresponding to the phase transitions of CsNO3 and AgNO3, respectively.

Le nitrate double NaRb2(NO3)3, composé intermédiaire du système binaire isobare NaNO3 + RbNO3: études thermiques et cristallographiques

NaRb2(NO3)3 nitrate is the only intermediate compound in the system NaNO3 + RbNO3. It has, according to a thermal study, three allotropic forms. The structure of the low-temperature form is presented.

Nitrate d'argent et de césium: AgCs(NO3)2

The structure of silver caesium dinitrate, AgCs(NO 3 ) 2 , consists of NO 3 - layers perpendicular to the [100] direction. The Ag + and Cs + cations are located between the layers, forming AgO 5 and CsO 12 polyhedra The NO 3 - groups are planar.